Merge branches 'pm-cpufreq-sched' and 'pm-opp'
* pm-cpufreq-sched:
cpufreq: schedutil: Reset cached_raw_freq when not in sync with next_freq
* pm-opp:
PM / OPP: Add dev_pm_opp_{un}register_get_pstate_helper()
PM / OPP: Support updating performance state of device's power domain
PM / OPP: add missing of_node_put() for of_get_cpu_node()
PM / OPP: Rename dev_pm_opp_register_put_opp_helper()
PM / OPP: Add missing of_node_put(np)
PM / OPP: Move error message to debug level
PM / OPP: Use snprintf() to avoid kasprintf() and kfree()
PM / OPP: Move the OPP directory out of power/
This commit is contained in:
Rafael J. Wysocki
@@ -2,7 +2,6 @@
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obj-$(CONFIG_PM) += sysfs.o generic_ops.o common.o qos.o runtime.o wakeirq.o
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obj-$(CONFIG_PM_SLEEP) += main.o wakeup.o
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obj-$(CONFIG_PM_TRACE_RTC) += trace.o
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obj-$(CONFIG_PM_OPP) += opp/
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obj-$(CONFIG_PM_GENERIC_DOMAINS) += domain.o domain_governor.o
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obj-$(CONFIG_HAVE_CLK) += clock_ops.o
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@@ -1,4 +0,0 @@
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ccflags-$(CONFIG_DEBUG_DRIVER) := -DDEBUG
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obj-y += core.o cpu.o
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obj-$(CONFIG_OF) += of.o
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obj-$(CONFIG_DEBUG_FS) += debugfs.o
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File diff suppressed because it is too large
Load Diff
@@ -1,236 +0,0 @@
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/*
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* Generic OPP helper interface for CPU device
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*
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* Copyright (C) 2009-2014 Texas Instruments Incorporated.
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* Nishanth Menon
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* Romit Dasgupta
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* Kevin Hilman
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/cpu.h>
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#include <linux/cpufreq.h>
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#include <linux/err.h>
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#include <linux/errno.h>
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#include <linux/export.h>
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#include <linux/slab.h>
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#include "opp.h"
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#ifdef CONFIG_CPU_FREQ
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/**
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* dev_pm_opp_init_cpufreq_table() - create a cpufreq table for a device
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* @dev: device for which we do this operation
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* @table: Cpufreq table returned back to caller
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*
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* Generate a cpufreq table for a provided device- this assumes that the
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* opp table is already initialized and ready for usage.
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*
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* This function allocates required memory for the cpufreq table. It is
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* expected that the caller does the required maintenance such as freeing
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* the table as required.
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*
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* Returns -EINVAL for bad pointers, -ENODEV if the device is not found, -ENOMEM
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* if no memory available for the operation (table is not populated), returns 0
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* if successful and table is populated.
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*
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* WARNING: It is important for the callers to ensure refreshing their copy of
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* the table if any of the mentioned functions have been invoked in the interim.
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*/
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int dev_pm_opp_init_cpufreq_table(struct device *dev,
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struct cpufreq_frequency_table **table)
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{
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struct dev_pm_opp *opp;
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struct cpufreq_frequency_table *freq_table = NULL;
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int i, max_opps, ret = 0;
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unsigned long rate;
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max_opps = dev_pm_opp_get_opp_count(dev);
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if (max_opps <= 0)
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return max_opps ? max_opps : -ENODATA;
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freq_table = kcalloc((max_opps + 1), sizeof(*freq_table), GFP_ATOMIC);
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if (!freq_table)
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return -ENOMEM;
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|
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for (i = 0, rate = 0; i < max_opps; i++, rate++) {
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/* find next rate */
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opp = dev_pm_opp_find_freq_ceil(dev, &rate);
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if (IS_ERR(opp)) {
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ret = PTR_ERR(opp);
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goto out;
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}
|
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freq_table[i].driver_data = i;
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freq_table[i].frequency = rate / 1000;
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|
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/* Is Boost/turbo opp ? */
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if (dev_pm_opp_is_turbo(opp))
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freq_table[i].flags = CPUFREQ_BOOST_FREQ;
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|
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dev_pm_opp_put(opp);
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}
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freq_table[i].driver_data = i;
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freq_table[i].frequency = CPUFREQ_TABLE_END;
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*table = &freq_table[0];
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out:
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if (ret)
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kfree(freq_table);
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return ret;
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}
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EXPORT_SYMBOL_GPL(dev_pm_opp_init_cpufreq_table);
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/**
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* dev_pm_opp_free_cpufreq_table() - free the cpufreq table
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* @dev: device for which we do this operation
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* @table: table to free
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*
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* Free up the table allocated by dev_pm_opp_init_cpufreq_table
|
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*/
|
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void dev_pm_opp_free_cpufreq_table(struct device *dev,
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struct cpufreq_frequency_table **table)
|
||||
{
|
||||
if (!table)
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||||
return;
|
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|
||||
kfree(*table);
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*table = NULL;
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||||
}
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_free_cpufreq_table);
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#endif /* CONFIG_CPU_FREQ */
|
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|
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void _dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask, bool of)
|
||||
{
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struct device *cpu_dev;
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||||
int cpu;
|
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|
||||
WARN_ON(cpumask_empty(cpumask));
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|
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for_each_cpu(cpu, cpumask) {
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cpu_dev = get_cpu_device(cpu);
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if (!cpu_dev) {
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||||
pr_err("%s: failed to get cpu%d device\n", __func__,
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||||
cpu);
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||||
continue;
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}
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|
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if (of)
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dev_pm_opp_of_remove_table(cpu_dev);
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else
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dev_pm_opp_remove_table(cpu_dev);
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}
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}
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/**
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* dev_pm_opp_cpumask_remove_table() - Removes OPP table for @cpumask
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* @cpumask: cpumask for which OPP table needs to be removed
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*
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* This removes the OPP tables for CPUs present in the @cpumask.
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* This should be used to remove all the OPPs entries associated with
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* the cpus in @cpumask.
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*/
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void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask)
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{
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_dev_pm_opp_cpumask_remove_table(cpumask, false);
|
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}
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EXPORT_SYMBOL_GPL(dev_pm_opp_cpumask_remove_table);
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/**
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* dev_pm_opp_set_sharing_cpus() - Mark OPP table as shared by few CPUs
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* @cpu_dev: CPU device for which we do this operation
|
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* @cpumask: cpumask of the CPUs which share the OPP table with @cpu_dev
|
||||
*
|
||||
* This marks OPP table of the @cpu_dev as shared by the CPUs present in
|
||||
* @cpumask.
|
||||
*
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||||
* Returns -ENODEV if OPP table isn't already present.
|
||||
*/
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||||
int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev,
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||||
const struct cpumask *cpumask)
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{
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struct opp_device *opp_dev;
|
||||
struct opp_table *opp_table;
|
||||
struct device *dev;
|
||||
int cpu, ret = 0;
|
||||
|
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opp_table = _find_opp_table(cpu_dev);
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||||
if (IS_ERR(opp_table))
|
||||
return PTR_ERR(opp_table);
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|
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for_each_cpu(cpu, cpumask) {
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if (cpu == cpu_dev->id)
|
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continue;
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|
||||
dev = get_cpu_device(cpu);
|
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if (!dev) {
|
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dev_err(cpu_dev, "%s: failed to get cpu%d device\n",
|
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__func__, cpu);
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continue;
|
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}
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|
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opp_dev = _add_opp_dev(dev, opp_table);
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if (!opp_dev) {
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dev_err(dev, "%s: failed to add opp-dev for cpu%d device\n",
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__func__, cpu);
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continue;
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}
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/* Mark opp-table as multiple CPUs are sharing it now */
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opp_table->shared_opp = OPP_TABLE_ACCESS_SHARED;
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}
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dev_pm_opp_put_opp_table(opp_table);
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|
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return ret;
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}
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_set_sharing_cpus);
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|
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/**
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||||
* dev_pm_opp_get_sharing_cpus() - Get cpumask of CPUs sharing OPPs with @cpu_dev
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* @cpu_dev: CPU device for which we do this operation
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||||
* @cpumask: cpumask to update with information of sharing CPUs
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||||
*
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||||
* This updates the @cpumask with CPUs that are sharing OPPs with @cpu_dev.
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*
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* Returns -ENODEV if OPP table isn't already present and -EINVAL if the OPP
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* table's status is access-unknown.
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*/
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int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask)
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{
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struct opp_device *opp_dev;
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struct opp_table *opp_table;
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int ret = 0;
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|
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opp_table = _find_opp_table(cpu_dev);
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if (IS_ERR(opp_table))
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return PTR_ERR(opp_table);
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|
||||
if (opp_table->shared_opp == OPP_TABLE_ACCESS_UNKNOWN) {
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||||
ret = -EINVAL;
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goto put_opp_table;
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||||
}
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cpumask_clear(cpumask);
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if (opp_table->shared_opp == OPP_TABLE_ACCESS_SHARED) {
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list_for_each_entry(opp_dev, &opp_table->dev_list, node)
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cpumask_set_cpu(opp_dev->dev->id, cpumask);
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} else {
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cpumask_set_cpu(cpu_dev->id, cpumask);
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}
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put_opp_table:
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dev_pm_opp_put_opp_table(opp_table);
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return ret;
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}
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EXPORT_SYMBOL_GPL(dev_pm_opp_get_sharing_cpus);
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@@ -1,249 +0,0 @@
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/*
|
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* Generic OPP debugfs interface
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*
|
||||
* Copyright (C) 2015-2016 Viresh Kumar <viresh.kumar@linaro.org>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*/
|
||||
|
||||
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
||||
|
||||
#include <linux/debugfs.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/limits.h>
|
||||
#include <linux/slab.h>
|
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|
||||
#include "opp.h"
|
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|
||||
static struct dentry *rootdir;
|
||||
|
||||
static void opp_set_dev_name(const struct device *dev, char *name)
|
||||
{
|
||||
if (dev->parent)
|
||||
snprintf(name, NAME_MAX, "%s-%s", dev_name(dev->parent),
|
||||
dev_name(dev));
|
||||
else
|
||||
snprintf(name, NAME_MAX, "%s", dev_name(dev));
|
||||
}
|
||||
|
||||
void opp_debug_remove_one(struct dev_pm_opp *opp)
|
||||
{
|
||||
debugfs_remove_recursive(opp->dentry);
|
||||
}
|
||||
|
||||
static bool opp_debug_create_supplies(struct dev_pm_opp *opp,
|
||||
struct opp_table *opp_table,
|
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struct dentry *pdentry)
|
||||
{
|
||||
struct dentry *d;
|
||||
int i;
|
||||
char *name;
|
||||
|
||||
for (i = 0; i < opp_table->regulator_count; i++) {
|
||||
name = kasprintf(GFP_KERNEL, "supply-%d", i);
|
||||
|
||||
/* Create per-opp directory */
|
||||
d = debugfs_create_dir(name, pdentry);
|
||||
|
||||
kfree(name);
|
||||
|
||||
if (!d)
|
||||
return false;
|
||||
|
||||
if (!debugfs_create_ulong("u_volt_target", S_IRUGO, d,
|
||||
&opp->supplies[i].u_volt))
|
||||
return false;
|
||||
|
||||
if (!debugfs_create_ulong("u_volt_min", S_IRUGO, d,
|
||||
&opp->supplies[i].u_volt_min))
|
||||
return false;
|
||||
|
||||
if (!debugfs_create_ulong("u_volt_max", S_IRUGO, d,
|
||||
&opp->supplies[i].u_volt_max))
|
||||
return false;
|
||||
|
||||
if (!debugfs_create_ulong("u_amp", S_IRUGO, d,
|
||||
&opp->supplies[i].u_amp))
|
||||
return false;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
int opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table)
|
||||
{
|
||||
struct dentry *pdentry = opp_table->dentry;
|
||||
struct dentry *d;
|
||||
char name[25]; /* 20 chars for 64 bit value + 5 (opp:\0) */
|
||||
|
||||
/* Rate is unique to each OPP, use it to give opp-name */
|
||||
snprintf(name, sizeof(name), "opp:%lu", opp->rate);
|
||||
|
||||
/* Create per-opp directory */
|
||||
d = debugfs_create_dir(name, pdentry);
|
||||
if (!d)
|
||||
return -ENOMEM;
|
||||
|
||||
if (!debugfs_create_bool("available", S_IRUGO, d, &opp->available))
|
||||
return -ENOMEM;
|
||||
|
||||
if (!debugfs_create_bool("dynamic", S_IRUGO, d, &opp->dynamic))
|
||||
return -ENOMEM;
|
||||
|
||||
if (!debugfs_create_bool("turbo", S_IRUGO, d, &opp->turbo))
|
||||
return -ENOMEM;
|
||||
|
||||
if (!debugfs_create_bool("suspend", S_IRUGO, d, &opp->suspend))
|
||||
return -ENOMEM;
|
||||
|
||||
if (!debugfs_create_ulong("rate_hz", S_IRUGO, d, &opp->rate))
|
||||
return -ENOMEM;
|
||||
|
||||
if (!opp_debug_create_supplies(opp, opp_table, d))
|
||||
return -ENOMEM;
|
||||
|
||||
if (!debugfs_create_ulong("clock_latency_ns", S_IRUGO, d,
|
||||
&opp->clock_latency_ns))
|
||||
return -ENOMEM;
|
||||
|
||||
opp->dentry = d;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int opp_list_debug_create_dir(struct opp_device *opp_dev,
|
||||
struct opp_table *opp_table)
|
||||
{
|
||||
const struct device *dev = opp_dev->dev;
|
||||
struct dentry *d;
|
||||
|
||||
opp_set_dev_name(dev, opp_table->dentry_name);
|
||||
|
||||
/* Create device specific directory */
|
||||
d = debugfs_create_dir(opp_table->dentry_name, rootdir);
|
||||
if (!d) {
|
||||
dev_err(dev, "%s: Failed to create debugfs dir\n", __func__);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
opp_dev->dentry = d;
|
||||
opp_table->dentry = d;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int opp_list_debug_create_link(struct opp_device *opp_dev,
|
||||
struct opp_table *opp_table)
|
||||
{
|
||||
const struct device *dev = opp_dev->dev;
|
||||
char name[NAME_MAX];
|
||||
struct dentry *d;
|
||||
|
||||
opp_set_dev_name(opp_dev->dev, name);
|
||||
|
||||
/* Create device specific directory link */
|
||||
d = debugfs_create_symlink(name, rootdir, opp_table->dentry_name);
|
||||
if (!d) {
|
||||
dev_err(dev, "%s: Failed to create link\n", __func__);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
opp_dev->dentry = d;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* opp_debug_register - add a device opp node to the debugfs 'opp' directory
|
||||
* @opp_dev: opp-dev pointer for device
|
||||
* @opp_table: the device-opp being added
|
||||
*
|
||||
* Dynamically adds device specific directory in debugfs 'opp' directory. If the
|
||||
* device-opp is shared with other devices, then links will be created for all
|
||||
* devices except the first.
|
||||
*
|
||||
* Return: 0 on success, otherwise negative error.
|
||||
*/
|
||||
int opp_debug_register(struct opp_device *opp_dev, struct opp_table *opp_table)
|
||||
{
|
||||
if (!rootdir) {
|
||||
pr_debug("%s: Uninitialized rootdir\n", __func__);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (opp_table->dentry)
|
||||
return opp_list_debug_create_link(opp_dev, opp_table);
|
||||
|
||||
return opp_list_debug_create_dir(opp_dev, opp_table);
|
||||
}
|
||||
|
||||
static void opp_migrate_dentry(struct opp_device *opp_dev,
|
||||
struct opp_table *opp_table)
|
||||
{
|
||||
struct opp_device *new_dev;
|
||||
const struct device *dev;
|
||||
struct dentry *dentry;
|
||||
|
||||
/* Look for next opp-dev */
|
||||
list_for_each_entry(new_dev, &opp_table->dev_list, node)
|
||||
if (new_dev != opp_dev)
|
||||
break;
|
||||
|
||||
/* new_dev is guaranteed to be valid here */
|
||||
dev = new_dev->dev;
|
||||
debugfs_remove_recursive(new_dev->dentry);
|
||||
|
||||
opp_set_dev_name(dev, opp_table->dentry_name);
|
||||
|
||||
dentry = debugfs_rename(rootdir, opp_dev->dentry, rootdir,
|
||||
opp_table->dentry_name);
|
||||
if (!dentry) {
|
||||
dev_err(dev, "%s: Failed to rename link from: %s to %s\n",
|
||||
__func__, dev_name(opp_dev->dev), dev_name(dev));
|
||||
return;
|
||||
}
|
||||
|
||||
new_dev->dentry = dentry;
|
||||
opp_table->dentry = dentry;
|
||||
}
|
||||
|
||||
/**
|
||||
* opp_debug_unregister - remove a device opp node from debugfs opp directory
|
||||
* @opp_dev: opp-dev pointer for device
|
||||
* @opp_table: the device-opp being removed
|
||||
*
|
||||
* Dynamically removes device specific directory from debugfs 'opp' directory.
|
||||
*/
|
||||
void opp_debug_unregister(struct opp_device *opp_dev,
|
||||
struct opp_table *opp_table)
|
||||
{
|
||||
if (opp_dev->dentry == opp_table->dentry) {
|
||||
/* Move the real dentry object under another device */
|
||||
if (!list_is_singular(&opp_table->dev_list)) {
|
||||
opp_migrate_dentry(opp_dev, opp_table);
|
||||
goto out;
|
||||
}
|
||||
opp_table->dentry = NULL;
|
||||
}
|
||||
|
||||
debugfs_remove_recursive(opp_dev->dentry);
|
||||
|
||||
out:
|
||||
opp_dev->dentry = NULL;
|
||||
}
|
||||
|
||||
static int __init opp_debug_init(void)
|
||||
{
|
||||
/* Create /sys/kernel/debug/opp directory */
|
||||
rootdir = debugfs_create_dir("opp", NULL);
|
||||
if (!rootdir) {
|
||||
pr_err("%s: Failed to create root directory\n", __func__);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
core_initcall(opp_debug_init);
|
||||
@@ -1,633 +0,0 @@
|
||||
/*
|
||||
* Generic OPP OF helpers
|
||||
*
|
||||
* Copyright (C) 2009-2010 Texas Instruments Incorporated.
|
||||
* Nishanth Menon
|
||||
* Romit Dasgupta
|
||||
* Kevin Hilman
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*/
|
||||
|
||||
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
||||
|
||||
#include <linux/cpu.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/export.h>
|
||||
|
||||
#include "opp.h"
|
||||
|
||||
static struct opp_table *_managed_opp(const struct device_node *np)
|
||||
{
|
||||
struct opp_table *opp_table, *managed_table = NULL;
|
||||
|
||||
mutex_lock(&opp_table_lock);
|
||||
|
||||
list_for_each_entry(opp_table, &opp_tables, node) {
|
||||
if (opp_table->np == np) {
|
||||
/*
|
||||
* Multiple devices can point to the same OPP table and
|
||||
* so will have same node-pointer, np.
|
||||
*
|
||||
* But the OPPs will be considered as shared only if the
|
||||
* OPP table contains a "opp-shared" property.
|
||||
*/
|
||||
if (opp_table->shared_opp == OPP_TABLE_ACCESS_SHARED) {
|
||||
_get_opp_table_kref(opp_table);
|
||||
managed_table = opp_table;
|
||||
}
|
||||
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
mutex_unlock(&opp_table_lock);
|
||||
|
||||
return managed_table;
|
||||
}
|
||||
|
||||
void _of_init_opp_table(struct opp_table *opp_table, struct device *dev)
|
||||
{
|
||||
struct device_node *np;
|
||||
|
||||
/*
|
||||
* Only required for backward compatibility with v1 bindings, but isn't
|
||||
* harmful for other cases. And so we do it unconditionally.
|
||||
*/
|
||||
np = of_node_get(dev->of_node);
|
||||
if (np) {
|
||||
u32 val;
|
||||
|
||||
if (!of_property_read_u32(np, "clock-latency", &val))
|
||||
opp_table->clock_latency_ns_max = val;
|
||||
of_property_read_u32(np, "voltage-tolerance",
|
||||
&opp_table->voltage_tolerance_v1);
|
||||
of_node_put(np);
|
||||
}
|
||||
}
|
||||
|
||||
static bool _opp_is_supported(struct device *dev, struct opp_table *opp_table,
|
||||
struct device_node *np)
|
||||
{
|
||||
unsigned int count = opp_table->supported_hw_count;
|
||||
u32 version;
|
||||
int ret;
|
||||
|
||||
if (!opp_table->supported_hw) {
|
||||
/*
|
||||
* In the case that no supported_hw has been set by the
|
||||
* platform but there is an opp-supported-hw value set for
|
||||
* an OPP then the OPP should not be enabled as there is
|
||||
* no way to see if the hardware supports it.
|
||||
*/
|
||||
if (of_find_property(np, "opp-supported-hw", NULL))
|
||||
return false;
|
||||
else
|
||||
return true;
|
||||
}
|
||||
|
||||
while (count--) {
|
||||
ret = of_property_read_u32_index(np, "opp-supported-hw", count,
|
||||
&version);
|
||||
if (ret) {
|
||||
dev_warn(dev, "%s: failed to read opp-supported-hw property at index %d: %d\n",
|
||||
__func__, count, ret);
|
||||
return false;
|
||||
}
|
||||
|
||||
/* Both of these are bitwise masks of the versions */
|
||||
if (!(version & opp_table->supported_hw[count]))
|
||||
return false;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
static int opp_parse_supplies(struct dev_pm_opp *opp, struct device *dev,
|
||||
struct opp_table *opp_table)
|
||||
{
|
||||
u32 *microvolt, *microamp = NULL;
|
||||
int supplies, vcount, icount, ret, i, j;
|
||||
struct property *prop = NULL;
|
||||
char name[NAME_MAX];
|
||||
|
||||
supplies = opp_table->regulator_count ? opp_table->regulator_count : 1;
|
||||
|
||||
/* Search for "opp-microvolt-<name>" */
|
||||
if (opp_table->prop_name) {
|
||||
snprintf(name, sizeof(name), "opp-microvolt-%s",
|
||||
opp_table->prop_name);
|
||||
prop = of_find_property(opp->np, name, NULL);
|
||||
}
|
||||
|
||||
if (!prop) {
|
||||
/* Search for "opp-microvolt" */
|
||||
sprintf(name, "opp-microvolt");
|
||||
prop = of_find_property(opp->np, name, NULL);
|
||||
|
||||
/* Missing property isn't a problem, but an invalid entry is */
|
||||
if (!prop) {
|
||||
if (!opp_table->regulator_count)
|
||||
return 0;
|
||||
|
||||
dev_err(dev, "%s: opp-microvolt missing although OPP managing regulators\n",
|
||||
__func__);
|
||||
return -EINVAL;
|
||||
}
|
||||
}
|
||||
|
||||
vcount = of_property_count_u32_elems(opp->np, name);
|
||||
if (vcount < 0) {
|
||||
dev_err(dev, "%s: Invalid %s property (%d)\n",
|
||||
__func__, name, vcount);
|
||||
return vcount;
|
||||
}
|
||||
|
||||
/* There can be one or three elements per supply */
|
||||
if (vcount != supplies && vcount != supplies * 3) {
|
||||
dev_err(dev, "%s: Invalid number of elements in %s property (%d) with supplies (%d)\n",
|
||||
__func__, name, vcount, supplies);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
microvolt = kmalloc_array(vcount, sizeof(*microvolt), GFP_KERNEL);
|
||||
if (!microvolt)
|
||||
return -ENOMEM;
|
||||
|
||||
ret = of_property_read_u32_array(opp->np, name, microvolt, vcount);
|
||||
if (ret) {
|
||||
dev_err(dev, "%s: error parsing %s: %d\n", __func__, name, ret);
|
||||
ret = -EINVAL;
|
||||
goto free_microvolt;
|
||||
}
|
||||
|
||||
/* Search for "opp-microamp-<name>" */
|
||||
prop = NULL;
|
||||
if (opp_table->prop_name) {
|
||||
snprintf(name, sizeof(name), "opp-microamp-%s",
|
||||
opp_table->prop_name);
|
||||
prop = of_find_property(opp->np, name, NULL);
|
||||
}
|
||||
|
||||
if (!prop) {
|
||||
/* Search for "opp-microamp" */
|
||||
sprintf(name, "opp-microamp");
|
||||
prop = of_find_property(opp->np, name, NULL);
|
||||
}
|
||||
|
||||
if (prop) {
|
||||
icount = of_property_count_u32_elems(opp->np, name);
|
||||
if (icount < 0) {
|
||||
dev_err(dev, "%s: Invalid %s property (%d)\n", __func__,
|
||||
name, icount);
|
||||
ret = icount;
|
||||
goto free_microvolt;
|
||||
}
|
||||
|
||||
if (icount != supplies) {
|
||||
dev_err(dev, "%s: Invalid number of elements in %s property (%d) with supplies (%d)\n",
|
||||
__func__, name, icount, supplies);
|
||||
ret = -EINVAL;
|
||||
goto free_microvolt;
|
||||
}
|
||||
|
||||
microamp = kmalloc_array(icount, sizeof(*microamp), GFP_KERNEL);
|
||||
if (!microamp) {
|
||||
ret = -EINVAL;
|
||||
goto free_microvolt;
|
||||
}
|
||||
|
||||
ret = of_property_read_u32_array(opp->np, name, microamp,
|
||||
icount);
|
||||
if (ret) {
|
||||
dev_err(dev, "%s: error parsing %s: %d\n", __func__,
|
||||
name, ret);
|
||||
ret = -EINVAL;
|
||||
goto free_microamp;
|
||||
}
|
||||
}
|
||||
|
||||
for (i = 0, j = 0; i < supplies; i++) {
|
||||
opp->supplies[i].u_volt = microvolt[j++];
|
||||
|
||||
if (vcount == supplies) {
|
||||
opp->supplies[i].u_volt_min = opp->supplies[i].u_volt;
|
||||
opp->supplies[i].u_volt_max = opp->supplies[i].u_volt;
|
||||
} else {
|
||||
opp->supplies[i].u_volt_min = microvolt[j++];
|
||||
opp->supplies[i].u_volt_max = microvolt[j++];
|
||||
}
|
||||
|
||||
if (microamp)
|
||||
opp->supplies[i].u_amp = microamp[i];
|
||||
}
|
||||
|
||||
free_microamp:
|
||||
kfree(microamp);
|
||||
free_microvolt:
|
||||
kfree(microvolt);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* dev_pm_opp_of_remove_table() - Free OPP table entries created from static DT
|
||||
* entries
|
||||
* @dev: device pointer used to lookup OPP table.
|
||||
*
|
||||
* Free OPPs created using static entries present in DT.
|
||||
*/
|
||||
void dev_pm_opp_of_remove_table(struct device *dev)
|
||||
{
|
||||
_dev_pm_opp_find_and_remove_table(dev, false);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_of_remove_table);
|
||||
|
||||
/* Returns opp descriptor node for a device node, caller must
|
||||
* do of_node_put() */
|
||||
static struct device_node *_opp_of_get_opp_desc_node(struct device_node *np)
|
||||
{
|
||||
/*
|
||||
* There should be only ONE phandle present in "operating-points-v2"
|
||||
* property.
|
||||
*/
|
||||
|
||||
return of_parse_phandle(np, "operating-points-v2", 0);
|
||||
}
|
||||
|
||||
/* Returns opp descriptor node for a device, caller must do of_node_put() */
|
||||
struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev)
|
||||
{
|
||||
return _opp_of_get_opp_desc_node(dev->of_node);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_of_get_opp_desc_node);
|
||||
|
||||
/**
|
||||
* _opp_add_static_v2() - Allocate static OPPs (As per 'v2' DT bindings)
|
||||
* @opp_table: OPP table
|
||||
* @dev: device for which we do this operation
|
||||
* @np: device node
|
||||
*
|
||||
* This function adds an opp definition to the opp table and returns status. The
|
||||
* opp can be controlled using dev_pm_opp_enable/disable functions and may be
|
||||
* removed by dev_pm_opp_remove.
|
||||
*
|
||||
* Return:
|
||||
* 0 On success OR
|
||||
* Duplicate OPPs (both freq and volt are same) and opp->available
|
||||
* -EEXIST Freq are same and volt are different OR
|
||||
* Duplicate OPPs (both freq and volt are same) and !opp->available
|
||||
* -ENOMEM Memory allocation failure
|
||||
* -EINVAL Failed parsing the OPP node
|
||||
*/
|
||||
static int _opp_add_static_v2(struct opp_table *opp_table, struct device *dev,
|
||||
struct device_node *np)
|
||||
{
|
||||
struct dev_pm_opp *new_opp;
|
||||
u64 rate;
|
||||
u32 val;
|
||||
int ret;
|
||||
|
||||
new_opp = _opp_allocate(opp_table);
|
||||
if (!new_opp)
|
||||
return -ENOMEM;
|
||||
|
||||
ret = of_property_read_u64(np, "opp-hz", &rate);
|
||||
if (ret < 0) {
|
||||
dev_err(dev, "%s: opp-hz not found\n", __func__);
|
||||
goto free_opp;
|
||||
}
|
||||
|
||||
/* Check if the OPP supports hardware's hierarchy of versions or not */
|
||||
if (!_opp_is_supported(dev, opp_table, np)) {
|
||||
dev_dbg(dev, "OPP not supported by hardware: %llu\n", rate);
|
||||
goto free_opp;
|
||||
}
|
||||
|
||||
/*
|
||||
* Rate is defined as an unsigned long in clk API, and so casting
|
||||
* explicitly to its type. Must be fixed once rate is 64 bit
|
||||
* guaranteed in clk API.
|
||||
*/
|
||||
new_opp->rate = (unsigned long)rate;
|
||||
new_opp->turbo = of_property_read_bool(np, "turbo-mode");
|
||||
|
||||
new_opp->np = np;
|
||||
new_opp->dynamic = false;
|
||||
new_opp->available = true;
|
||||
|
||||
if (!of_property_read_u32(np, "clock-latency-ns", &val))
|
||||
new_opp->clock_latency_ns = val;
|
||||
|
||||
ret = opp_parse_supplies(new_opp, dev, opp_table);
|
||||
if (ret)
|
||||
goto free_opp;
|
||||
|
||||
ret = _opp_add(dev, new_opp, opp_table);
|
||||
if (ret) {
|
||||
/* Don't return error for duplicate OPPs */
|
||||
if (ret == -EBUSY)
|
||||
ret = 0;
|
||||
goto free_opp;
|
||||
}
|
||||
|
||||
/* OPP to select on device suspend */
|
||||
if (of_property_read_bool(np, "opp-suspend")) {
|
||||
if (opp_table->suspend_opp) {
|
||||
dev_warn(dev, "%s: Multiple suspend OPPs found (%lu %lu)\n",
|
||||
__func__, opp_table->suspend_opp->rate,
|
||||
new_opp->rate);
|
||||
} else {
|
||||
new_opp->suspend = true;
|
||||
opp_table->suspend_opp = new_opp;
|
||||
}
|
||||
}
|
||||
|
||||
if (new_opp->clock_latency_ns > opp_table->clock_latency_ns_max)
|
||||
opp_table->clock_latency_ns_max = new_opp->clock_latency_ns;
|
||||
|
||||
pr_debug("%s: turbo:%d rate:%lu uv:%lu uvmin:%lu uvmax:%lu latency:%lu\n",
|
||||
__func__, new_opp->turbo, new_opp->rate,
|
||||
new_opp->supplies[0].u_volt, new_opp->supplies[0].u_volt_min,
|
||||
new_opp->supplies[0].u_volt_max, new_opp->clock_latency_ns);
|
||||
|
||||
/*
|
||||
* Notify the changes in the availability of the operable
|
||||
* frequency/voltage list.
|
||||
*/
|
||||
blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_ADD, new_opp);
|
||||
return 0;
|
||||
|
||||
free_opp:
|
||||
_opp_free(new_opp);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* Initializes OPP tables based on new bindings */
|
||||
static int _of_add_opp_table_v2(struct device *dev, struct device_node *opp_np)
|
||||
{
|
||||
struct device_node *np;
|
||||
struct opp_table *opp_table;
|
||||
int ret = 0, count = 0;
|
||||
|
||||
opp_table = _managed_opp(opp_np);
|
||||
if (opp_table) {
|
||||
/* OPPs are already managed */
|
||||
if (!_add_opp_dev(dev, opp_table))
|
||||
ret = -ENOMEM;
|
||||
goto put_opp_table;
|
||||
}
|
||||
|
||||
opp_table = dev_pm_opp_get_opp_table(dev);
|
||||
if (!opp_table)
|
||||
return -ENOMEM;
|
||||
|
||||
/* We have opp-table node now, iterate over it and add OPPs */
|
||||
for_each_available_child_of_node(opp_np, np) {
|
||||
count++;
|
||||
|
||||
ret = _opp_add_static_v2(opp_table, dev, np);
|
||||
if (ret) {
|
||||
dev_err(dev, "%s: Failed to add OPP, %d\n", __func__,
|
||||
ret);
|
||||
_dev_pm_opp_remove_table(opp_table, dev, false);
|
||||
goto put_opp_table;
|
||||
}
|
||||
}
|
||||
|
||||
/* There should be one of more OPP defined */
|
||||
if (WARN_ON(!count)) {
|
||||
ret = -ENOENT;
|
||||
goto put_opp_table;
|
||||
}
|
||||
|
||||
opp_table->np = opp_np;
|
||||
if (of_property_read_bool(opp_np, "opp-shared"))
|
||||
opp_table->shared_opp = OPP_TABLE_ACCESS_SHARED;
|
||||
else
|
||||
opp_table->shared_opp = OPP_TABLE_ACCESS_EXCLUSIVE;
|
||||
|
||||
put_opp_table:
|
||||
dev_pm_opp_put_opp_table(opp_table);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* Initializes OPP tables based on old-deprecated bindings */
|
||||
static int _of_add_opp_table_v1(struct device *dev)
|
||||
{
|
||||
struct opp_table *opp_table;
|
||||
const struct property *prop;
|
||||
const __be32 *val;
|
||||
int nr, ret = 0;
|
||||
|
||||
prop = of_find_property(dev->of_node, "operating-points", NULL);
|
||||
if (!prop)
|
||||
return -ENODEV;
|
||||
if (!prop->value)
|
||||
return -ENODATA;
|
||||
|
||||
/*
|
||||
* Each OPP is a set of tuples consisting of frequency and
|
||||
* voltage like <freq-kHz vol-uV>.
|
||||
*/
|
||||
nr = prop->length / sizeof(u32);
|
||||
if (nr % 2) {
|
||||
dev_err(dev, "%s: Invalid OPP table\n", __func__);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
opp_table = dev_pm_opp_get_opp_table(dev);
|
||||
if (!opp_table)
|
||||
return -ENOMEM;
|
||||
|
||||
val = prop->value;
|
||||
while (nr) {
|
||||
unsigned long freq = be32_to_cpup(val++) * 1000;
|
||||
unsigned long volt = be32_to_cpup(val++);
|
||||
|
||||
ret = _opp_add_v1(opp_table, dev, freq, volt, false);
|
||||
if (ret) {
|
||||
dev_err(dev, "%s: Failed to add OPP %ld (%d)\n",
|
||||
__func__, freq, ret);
|
||||
_dev_pm_opp_remove_table(opp_table, dev, false);
|
||||
break;
|
||||
}
|
||||
nr -= 2;
|
||||
}
|
||||
|
||||
dev_pm_opp_put_opp_table(opp_table);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* dev_pm_opp_of_add_table() - Initialize opp table from device tree
|
||||
* @dev: device pointer used to lookup OPP table.
|
||||
*
|
||||
* Register the initial OPP table with the OPP library for given device.
|
||||
*
|
||||
* Return:
|
||||
* 0 On success OR
|
||||
* Duplicate OPPs (both freq and volt are same) and opp->available
|
||||
* -EEXIST Freq are same and volt are different OR
|
||||
* Duplicate OPPs (both freq and volt are same) and !opp->available
|
||||
* -ENOMEM Memory allocation failure
|
||||
* -ENODEV when 'operating-points' property is not found or is invalid data
|
||||
* in device node.
|
||||
* -ENODATA when empty 'operating-points' property is found
|
||||
* -EINVAL when invalid entries are found in opp-v2 table
|
||||
*/
|
||||
int dev_pm_opp_of_add_table(struct device *dev)
|
||||
{
|
||||
struct device_node *opp_np;
|
||||
int ret;
|
||||
|
||||
/*
|
||||
* OPPs have two version of bindings now. The older one is deprecated,
|
||||
* try for the new binding first.
|
||||
*/
|
||||
opp_np = dev_pm_opp_of_get_opp_desc_node(dev);
|
||||
if (!opp_np) {
|
||||
/*
|
||||
* Try old-deprecated bindings for backward compatibility with
|
||||
* older dtbs.
|
||||
*/
|
||||
return _of_add_opp_table_v1(dev);
|
||||
}
|
||||
|
||||
ret = _of_add_opp_table_v2(dev, opp_np);
|
||||
of_node_put(opp_np);
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_of_add_table);
|
||||
|
||||
/* CPU device specific helpers */
|
||||
|
||||
/**
|
||||
* dev_pm_opp_of_cpumask_remove_table() - Removes OPP table for @cpumask
|
||||
* @cpumask: cpumask for which OPP table needs to be removed
|
||||
*
|
||||
* This removes the OPP tables for CPUs present in the @cpumask.
|
||||
* This should be used only to remove static entries created from DT.
|
||||
*/
|
||||
void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask)
|
||||
{
|
||||
_dev_pm_opp_cpumask_remove_table(cpumask, true);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_of_cpumask_remove_table);
|
||||
|
||||
/**
|
||||
* dev_pm_opp_of_cpumask_add_table() - Adds OPP table for @cpumask
|
||||
* @cpumask: cpumask for which OPP table needs to be added.
|
||||
*
|
||||
* This adds the OPP tables for CPUs present in the @cpumask.
|
||||
*/
|
||||
int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask)
|
||||
{
|
||||
struct device *cpu_dev;
|
||||
int cpu, ret = 0;
|
||||
|
||||
WARN_ON(cpumask_empty(cpumask));
|
||||
|
||||
for_each_cpu(cpu, cpumask) {
|
||||
cpu_dev = get_cpu_device(cpu);
|
||||
if (!cpu_dev) {
|
||||
pr_err("%s: failed to get cpu%d device\n", __func__,
|
||||
cpu);
|
||||
continue;
|
||||
}
|
||||
|
||||
ret = dev_pm_opp_of_add_table(cpu_dev);
|
||||
if (ret) {
|
||||
/*
|
||||
* OPP may get registered dynamically, don't print error
|
||||
* message here.
|
||||
*/
|
||||
pr_debug("%s: couldn't find opp table for cpu:%d, %d\n",
|
||||
__func__, cpu, ret);
|
||||
|
||||
/* Free all other OPPs */
|
||||
dev_pm_opp_of_cpumask_remove_table(cpumask);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_of_cpumask_add_table);
|
||||
|
||||
/*
|
||||
* Works only for OPP v2 bindings.
|
||||
*
|
||||
* Returns -ENOENT if operating-points-v2 bindings aren't supported.
|
||||
*/
|
||||
/**
|
||||
* dev_pm_opp_of_get_sharing_cpus() - Get cpumask of CPUs sharing OPPs with
|
||||
* @cpu_dev using operating-points-v2
|
||||
* bindings.
|
||||
*
|
||||
* @cpu_dev: CPU device for which we do this operation
|
||||
* @cpumask: cpumask to update with information of sharing CPUs
|
||||
*
|
||||
* This updates the @cpumask with CPUs that are sharing OPPs with @cpu_dev.
|
||||
*
|
||||
* Returns -ENOENT if operating-points-v2 isn't present for @cpu_dev.
|
||||
*/
|
||||
int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev,
|
||||
struct cpumask *cpumask)
|
||||
{
|
||||
struct device_node *np, *tmp_np, *cpu_np;
|
||||
int cpu, ret = 0;
|
||||
|
||||
/* Get OPP descriptor node */
|
||||
np = dev_pm_opp_of_get_opp_desc_node(cpu_dev);
|
||||
if (!np) {
|
||||
dev_dbg(cpu_dev, "%s: Couldn't find opp node.\n", __func__);
|
||||
return -ENOENT;
|
||||
}
|
||||
|
||||
cpumask_set_cpu(cpu_dev->id, cpumask);
|
||||
|
||||
/* OPPs are shared ? */
|
||||
if (!of_property_read_bool(np, "opp-shared"))
|
||||
goto put_cpu_node;
|
||||
|
||||
for_each_possible_cpu(cpu) {
|
||||
if (cpu == cpu_dev->id)
|
||||
continue;
|
||||
|
||||
cpu_np = of_get_cpu_node(cpu, NULL);
|
||||
if (!cpu_np) {
|
||||
dev_err(cpu_dev, "%s: failed to get cpu%d node\n",
|
||||
__func__, cpu);
|
||||
ret = -ENOENT;
|
||||
goto put_cpu_node;
|
||||
}
|
||||
|
||||
/* Get OPP descriptor node */
|
||||
tmp_np = _opp_of_get_opp_desc_node(cpu_np);
|
||||
if (!tmp_np) {
|
||||
pr_err("%pOF: Couldn't find opp node\n", cpu_np);
|
||||
ret = -ENOENT;
|
||||
goto put_cpu_node;
|
||||
}
|
||||
|
||||
/* CPUs are sharing opp node */
|
||||
if (np == tmp_np)
|
||||
cpumask_set_cpu(cpu, cpumask);
|
||||
|
||||
of_node_put(tmp_np);
|
||||
}
|
||||
|
||||
put_cpu_node:
|
||||
of_node_put(np);
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_of_get_sharing_cpus);
|
||||
@@ -1,222 +0,0 @@
|
||||
/*
|
||||
* Generic OPP Interface
|
||||
*
|
||||
* Copyright (C) 2009-2010 Texas Instruments Incorporated.
|
||||
* Nishanth Menon
|
||||
* Romit Dasgupta
|
||||
* Kevin Hilman
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*/
|
||||
|
||||
#ifndef __DRIVER_OPP_H__
|
||||
#define __DRIVER_OPP_H__
|
||||
|
||||
#include <linux/device.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/kref.h>
|
||||
#include <linux/list.h>
|
||||
#include <linux/limits.h>
|
||||
#include <linux/pm_opp.h>
|
||||
#include <linux/notifier.h>
|
||||
|
||||
struct clk;
|
||||
struct regulator;
|
||||
|
||||
/* Lock to allow exclusive modification to the device and opp lists */
|
||||
extern struct mutex opp_table_lock;
|
||||
|
||||
extern struct list_head opp_tables;
|
||||
|
||||
/*
|
||||
* Internal data structure organization with the OPP layer library is as
|
||||
* follows:
|
||||
* opp_tables (root)
|
||||
* |- device 1 (represents voltage domain 1)
|
||||
* | |- opp 1 (availability, freq, voltage)
|
||||
* | |- opp 2 ..
|
||||
* ... ...
|
||||
* | `- opp n ..
|
||||
* |- device 2 (represents the next voltage domain)
|
||||
* ...
|
||||
* `- device m (represents mth voltage domain)
|
||||
* device 1, 2.. are represented by opp_table structure while each opp
|
||||
* is represented by the opp structure.
|
||||
*/
|
||||
|
||||
/**
|
||||
* struct dev_pm_opp - Generic OPP description structure
|
||||
* @node: opp table node. The nodes are maintained throughout the lifetime
|
||||
* of boot. It is expected only an optimal set of OPPs are
|
||||
* added to the library by the SoC framework.
|
||||
* IMPORTANT: the opp nodes should be maintained in increasing
|
||||
* order.
|
||||
* @kref: for reference count of the OPP.
|
||||
* @available: true/false - marks if this OPP as available or not
|
||||
* @dynamic: not-created from static DT entries.
|
||||
* @turbo: true if turbo (boost) OPP
|
||||
* @suspend: true if suspend OPP
|
||||
* @rate: Frequency in hertz
|
||||
* @supplies: Power supplies voltage/current values
|
||||
* @clock_latency_ns: Latency (in nanoseconds) of switching to this OPP's
|
||||
* frequency from any other OPP's frequency.
|
||||
* @opp_table: points back to the opp_table struct this opp belongs to
|
||||
* @np: OPP's device node.
|
||||
* @dentry: debugfs dentry pointer (per opp)
|
||||
*
|
||||
* This structure stores the OPP information for a given device.
|
||||
*/
|
||||
struct dev_pm_opp {
|
||||
struct list_head node;
|
||||
struct kref kref;
|
||||
|
||||
bool available;
|
||||
bool dynamic;
|
||||
bool turbo;
|
||||
bool suspend;
|
||||
unsigned long rate;
|
||||
|
||||
struct dev_pm_opp_supply *supplies;
|
||||
|
||||
unsigned long clock_latency_ns;
|
||||
|
||||
struct opp_table *opp_table;
|
||||
|
||||
struct device_node *np;
|
||||
|
||||
#ifdef CONFIG_DEBUG_FS
|
||||
struct dentry *dentry;
|
||||
#endif
|
||||
};
|
||||
|
||||
/**
|
||||
* struct opp_device - devices managed by 'struct opp_table'
|
||||
* @node: list node
|
||||
* @dev: device to which the struct object belongs
|
||||
* @dentry: debugfs dentry pointer (per device)
|
||||
*
|
||||
* This is an internal data structure maintaining the devices that are managed
|
||||
* by 'struct opp_table'.
|
||||
*/
|
||||
struct opp_device {
|
||||
struct list_head node;
|
||||
const struct device *dev;
|
||||
|
||||
#ifdef CONFIG_DEBUG_FS
|
||||
struct dentry *dentry;
|
||||
#endif
|
||||
};
|
||||
|
||||
enum opp_table_access {
|
||||
OPP_TABLE_ACCESS_UNKNOWN = 0,
|
||||
OPP_TABLE_ACCESS_EXCLUSIVE = 1,
|
||||
OPP_TABLE_ACCESS_SHARED = 2,
|
||||
};
|
||||
|
||||
/**
|
||||
* struct opp_table - Device opp structure
|
||||
* @node: table node - contains the devices with OPPs that
|
||||
* have been registered. Nodes once added are not modified in this
|
||||
* table.
|
||||
* @head: notifier head to notify the OPP availability changes.
|
||||
* @dev_list: list of devices that share these OPPs
|
||||
* @opp_list: table of opps
|
||||
* @kref: for reference count of the table.
|
||||
* @lock: mutex protecting the opp_list.
|
||||
* @np: struct device_node pointer for opp's DT node.
|
||||
* @clock_latency_ns_max: Max clock latency in nanoseconds.
|
||||
* @shared_opp: OPP is shared between multiple devices.
|
||||
* @suspend_opp: Pointer to OPP to be used during device suspend.
|
||||
* @supported_hw: Array of version number to support.
|
||||
* @supported_hw_count: Number of elements in supported_hw array.
|
||||
* @prop_name: A name to postfix to many DT properties, while parsing them.
|
||||
* @clk: Device's clock handle
|
||||
* @regulators: Supply regulators
|
||||
* @regulator_count: Number of power supply regulators
|
||||
* @set_opp: Platform specific set_opp callback
|
||||
* @set_opp_data: Data to be passed to set_opp callback
|
||||
* @dentry: debugfs dentry pointer of the real device directory (not links).
|
||||
* @dentry_name: Name of the real dentry.
|
||||
*
|
||||
* @voltage_tolerance_v1: In percentage, for v1 bindings only.
|
||||
*
|
||||
* This is an internal data structure maintaining the link to opps attached to
|
||||
* a device. This structure is not meant to be shared to users as it is
|
||||
* meant for book keeping and private to OPP library.
|
||||
*/
|
||||
struct opp_table {
|
||||
struct list_head node;
|
||||
|
||||
struct blocking_notifier_head head;
|
||||
struct list_head dev_list;
|
||||
struct list_head opp_list;
|
||||
struct kref kref;
|
||||
struct mutex lock;
|
||||
|
||||
struct device_node *np;
|
||||
unsigned long clock_latency_ns_max;
|
||||
|
||||
/* For backward compatibility with v1 bindings */
|
||||
unsigned int voltage_tolerance_v1;
|
||||
|
||||
enum opp_table_access shared_opp;
|
||||
struct dev_pm_opp *suspend_opp;
|
||||
|
||||
unsigned int *supported_hw;
|
||||
unsigned int supported_hw_count;
|
||||
const char *prop_name;
|
||||
struct clk *clk;
|
||||
struct regulator **regulators;
|
||||
unsigned int regulator_count;
|
||||
|
||||
int (*set_opp)(struct dev_pm_set_opp_data *data);
|
||||
struct dev_pm_set_opp_data *set_opp_data;
|
||||
|
||||
#ifdef CONFIG_DEBUG_FS
|
||||
struct dentry *dentry;
|
||||
char dentry_name[NAME_MAX];
|
||||
#endif
|
||||
};
|
||||
|
||||
/* Routines internal to opp core */
|
||||
void _get_opp_table_kref(struct opp_table *opp_table);
|
||||
struct opp_table *_find_opp_table(struct device *dev);
|
||||
struct opp_device *_add_opp_dev(const struct device *dev, struct opp_table *opp_table);
|
||||
void _dev_pm_opp_remove_table(struct opp_table *opp_table, struct device *dev, bool remove_all);
|
||||
void _dev_pm_opp_find_and_remove_table(struct device *dev, bool remove_all);
|
||||
struct dev_pm_opp *_opp_allocate(struct opp_table *opp_table);
|
||||
void _opp_free(struct dev_pm_opp *opp);
|
||||
int _opp_add(struct device *dev, struct dev_pm_opp *new_opp, struct opp_table *opp_table);
|
||||
int _opp_add_v1(struct opp_table *opp_table, struct device *dev, unsigned long freq, long u_volt, bool dynamic);
|
||||
void _dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask, bool of);
|
||||
struct opp_table *_add_opp_table(struct device *dev);
|
||||
|
||||
#ifdef CONFIG_OF
|
||||
void _of_init_opp_table(struct opp_table *opp_table, struct device *dev);
|
||||
#else
|
||||
static inline void _of_init_opp_table(struct opp_table *opp_table, struct device *dev) {}
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_DEBUG_FS
|
||||
void opp_debug_remove_one(struct dev_pm_opp *opp);
|
||||
int opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table);
|
||||
int opp_debug_register(struct opp_device *opp_dev, struct opp_table *opp_table);
|
||||
void opp_debug_unregister(struct opp_device *opp_dev, struct opp_table *opp_table);
|
||||
#else
|
||||
static inline void opp_debug_remove_one(struct dev_pm_opp *opp) {}
|
||||
|
||||
static inline int opp_debug_create_one(struct dev_pm_opp *opp,
|
||||
struct opp_table *opp_table)
|
||||
{ return 0; }
|
||||
static inline int opp_debug_register(struct opp_device *opp_dev,
|
||||
struct opp_table *opp_table)
|
||||
{ return 0; }
|
||||
|
||||
static inline void opp_debug_unregister(struct opp_device *opp_dev,
|
||||
struct opp_table *opp_table)
|
||||
{ }
|
||||
#endif /* DEBUG_FS */
|
||||
|
||||
#endif /* __DRIVER_OPP_H__ */
|
||||
Reference in New Issue
Block a user